Structure of neutron rich palladium isotopes produced in heavy ion induced fission

M. Houry - et al.

EPJ

a
b
c
d
e
ap
st
h
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ds
pv
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am
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2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A 6, 43-48

Structure of neutron rich palladium isotopes produced in heavy ion induced fission

M. Houry¹ - R. Lucas¹ - M.-G. Porquet² - Ch. Theisen¹ - M. Girod³ - M. Aiche⁴ - M.M. Aleonard⁴ - A. Astier⁵ - G. Barreau⁴ - F. Becker¹ - J.F. Chemin⁴ - I. Deloncle² - T.P. Doan⁴ - J.L. Durell⁶ - K. Hauschild¹ - W. Korten¹ - Y. Le Coz¹ - M.J. Leddy⁶ - S. Perries⁵ - N. Redon⁵ - A.A. Roach⁶ - J.N. Scheurer⁴ - A.G. Smith⁶ - B.J. Varley⁶

¹ CEA/SACLAY, DAPNIA/SPhN, F-91191 Gif sur Yvette, France
² CSNSM, CNRS-IN2P3 et Universit‰ de Paris-Sud, F-91405 Orsay, France
³ CEA/DIF, DPTA/SPN, F-91680 Bruyères-le-Châtel, France
⁴ CENBG, Domaine du Haut Vigneau, F-33175 Gradignan, France
⁵ IPNL, 43, Boulevard du 11 novembre 1918, F-69622 Villeurbanne, France
⁶ Department of Physics and Astronomy, Univ. of Manchester, M13 9PL, UK

Received: 30 June 1999 Communicated by B. Povh

Abstract
New band structures have been observed in ¹¹²Pd, ¹¹³Pd, ¹¹⁵Pd and ¹¹⁸Pd produced via the fusion-fission reaction ¹²C+²³⁸U at a bombarding energy of 90 MeV. $\gamma-\gamma-\gamma$ coincidence measurements have been performed with the Euroball III array. The first crossings observed in even-mass palladium up to A=118 are interpreted as the alignment of a $\nu h_{11/2}$ pair. This interpretation is supported by the rotational behavior of odd-mass palladium. Hartree-Fock-Bogoliubov calculations using D1S-Gogny force suggest a similar interpretation consistent with a prolate deformation.

PACS
25.70.Jj Fusion and fusion-fission reaction - 23.20.Lv Gamma transitions and level energies - 21.60.Ev Collective models - 21.60.Jz Hartree-Fock - 27.60.+j 90 $\le$ A $\leq$ 149